Emergency lighting lamp control circuit and chip
By combining a rectifier module, a comparator module, and an alignment module, the problem of misjudgment of the phase detection of the live and neutral wires in the emergency lighting control circuit is solved, enabling accurate identification and adjustment of the current flow direction to be consistent, and improving the practicality of mixed connection alignment.
Patent Information
- Application Number
- CN202520103280.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-01-15
AI Technical Summary
In existing emergency lighting control circuits, the phase detection of the live and neutral wires in the chip is prone to misjudgment, leading to inaccurate alignment due to misconnection.
A combined circuit consisting of a rectifier module, a first comparison module, a second comparison module, a logic judgment module, and an alignment module is used to determine the live and neutral wire information by the number of signal flips, ensuring accurate identification and adjustment of the current flow direction.
It enables accurate identification of live and neutral wire information in emergency lighting control circuits, avoids misjudgment, and improves the practicality and reliability of mixed connection alignment.
Smart Images
Figure CN223744953U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to integrated circuit technical field, concretely relates to an emergency lighting control circuit and chip. BACKGROUND
[0002] The prior art emergency lighting application, as shown in the following Figure 1 Usually need to have a plurality of chips in parallel on the AC mains, in order to ensure that a plurality of chips can work normally, need to unify the pin of a plurality of chips and the relative voltage of zero fire line. As shown in the following Figure 1 When the pin of chip 1 and chip 2 is reversed with zero fire line, one of chip 1 and chip 2 needs to adjust the circuit inside, so that the relative voltage of the pin of chip 1 and chip 2 and zero fire line is consistent (so that the current flow direction of chip 1, chip 2 relative to AC_1 end, AC_2 end is consistent). In this process, the potential of AC_1 end and AC_2 end needs to be identified for each chip, and the prior art is usually to detect the phase of zero fire line connected with AC_1 end and AC_2 end respectively, and according to the phase detection result, align each chip with AC_1 end and AC_2 end. Although the above-mentioned method can realize the alignment of zero fire line mixed connection, but this method is easy to produce phase misjudgment when the phase of zero fire line changes. SUMMARY
[0003] The utility model embodiment is to solve the above problems, and the utility model embodiment realizes the above-mentioned purpose through the following technical scheme.
[0004] The utility model embodiment provides an emergency lighting control circuit, the emergency lighting control circuit includes: rectifier module, its first, second input end and first AC end, second AC end are connected;First comparison module, its first input end is connected with the first output end of rectifier module, and its second input end is connected with the first reference voltage end;Second comparison module, its first input end is connected with the second output end of rectifier module, and its second input end is connected with the second reference voltage end;Logic judgment module is connected with the output end of first comparison module and the output end of second comparison module respectively, determines the zero fire line information corresponding to the connection of first AC end, second AC end according to the signal output of first comparison module and / or second comparison module;Alignment module is connected with logic judgment module, and is aligned according to zero fire line information.
[0005] In some embodiments, the logic judgment module includes a counter that counts the number of times the output signal of the first comparison module and / or the second comparison module flips, and determines the zero fire line information corresponding to the connection of the first AC end and the second AC end when the number of times reaches a predetermined number.
[0006] In some embodiments, the emergency lighting control circuit further comprises: a first voltage division module, a first end of which is connected with the first output end of the rectifier module, a second end of which is connected with the reference ground end, and an output end of which is connected with a first input end of the first comparison module.
[0007] In some embodiments, the emergency lighting control circuit further comprises: a second voltage division module, a first end of which is connected with the second output end of the rectifier module, a second end of which is connected with the reference ground end, and an output end of which is connected with a first input end of the second comparison module.
[0008] In some embodiments, the first reference voltage end is connected with the second reference voltage end.
[0009] In some embodiments, the emergency lighting control circuit is multiple in number.
[0010] The utility model embodiment further provides an emergency lighting control chip, comprising the emergency lighting control circuit of any one of the above embodiments.
[0011] Compared with the prior art, by adopting the emergency lighting control circuit comprising the rectifier module, the first comparison module, the second comparison module, the judgment module and the alignment module, the zero fire line information corresponding to the connection of the first alternating current end and the second alternating current end can be determined based on the signal output by the first comparison module and / or the second comparison module, so that the alignment of the emergency lighting control circuit is realized, not only the effect of determining the relative potential of each emergency lighting control circuit and the line body is achieved, but also the zero fire line information connected with the first alternating current end and the second alternating current end can be accurately identified, and misjudgment does not occur, and the practicability of mixed connection alignment is improved. BRIEF DESCRIPTION OF DRAWINGS
[0012] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will briefly introduce the drawings needed to be used in the description of the utility model embodiment. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.
[0013] Figure 1 is a system application schematic diagram of an emergency lighting control circuit in the prior art;
[0014] Figure 2 is a structure schematic diagram of the emergency lighting control circuit provided by the embodiment;
[0015] Figure 3 is another structure schematic diagram of the emergency lighting control circuit provided by the embodiment;
[0016] Figure 4This is another structural schematic diagram of the emergency lighting control circuit provided in this embodiment;
[0017] Figure 5 This is a schematic diagram of a voltage waveform effect of the emergency lighting control circuit provided in this embodiment;
[0018] Figure 6 This is another voltage waveform diagram of the emergency lighting control circuit provided in this embodiment. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.
[0020] The term "coupled" or "connected" in this invention includes both direct and indirect connections, such as connections made through active devices, passive devices, or electrical conduction media; it may also include connections made by other active or passive devices that are known to those skilled in the art and can achieve the same or similar functional purpose, such as connections made through switches, follower circuits, or other circuits or components.
[0021] Please see Figure 2 This utility model provides an emergency lighting control circuit, which includes: a rectifier module 11, whose first and second input terminals are connected to a first AC terminal AC_1 and a second AC terminal AC_2; a first comparison module 12, whose first input terminal V1 is connected to the first output terminal of the rectifier module 11, and whose second input terminal is connected to a first reference voltage terminal VREF1; a second comparison module 13, whose first input terminal V2 is connected to the second output terminal of the rectifier module 11, and whose second input terminal is connected to a second reference voltage terminal VREF2; a logic judgment module 14, which is connected to the output terminals of the first comparison module 12 and the second comparison module 13 respectively, and determines the neutral and live wire information corresponding to the first AC terminal AC_1 and the second AC terminal AC_2 based on the signals output by the first comparison module 12 and / or the second comparison module 13; and an alignment module 15, which is connected to the logic judgment module 14 and performs alignment based on the neutral and live wire information.
[0022] In this embodiment, the rectifier module 11 can rectify the AC power connected to the first AC terminal AC_1 and the second AC terminal AC_2, converting the original sinusoidal voltage waveform of the AC power into a half-wave voltage waveform. The rectifier module 11 can be a bridge rectifier circuit.
[0023] In this embodiment, the voltage of the first reference voltage terminal VREF1 can be the same as the voltage of the second reference voltage terminal VREF2. In this case, the first reference voltage terminal VREF1 can be connected to the second reference voltage terminal VREF2. The voltages of the first reference voltage terminal VREF1 and the second reference voltage terminal VREF2 must be between the peak and valley values of the rectified voltage. For the first comparison module 12 and the second comparison module 13, when the voltage at the first input terminal of the comparison module is less than the voltage at the reference voltage terminal, the comparison module outputs a first level; when the voltage at the first input terminal of the comparison module is greater than the voltage at the reference voltage terminal, the comparison module outputs a second level.
[0024] Specifically, when the first AC terminal AC_1 is connected to the live wire, the second AC terminal AC_2 is connected to the neutral wire, and the live and neutral wires are powered on, the voltage waveform at the first input terminal V1 of the first comparison module 12 and the voltage waveform at the first input terminal V2 of the second comparison module 13 are as follows: Figure 5 As shown. At this time, the voltage at the first input terminal V1 of the first comparison module 12 is compared with the voltage at the first reference voltage terminal VREF1. Whenever the voltage at the first input terminal V1 of the first comparison module 12 is greater than the voltage at the first reference voltage terminal VREF1, the output level of the first comparison module 12 changes from the first level to the second level. The voltage at the first input terminal V2 of the second comparison module 13 is compared with the voltage at the second reference voltage terminal VREF2. Since the voltage at the first input terminal V2 of the second comparison module 13 is always less than the voltage at the second reference voltage terminal VREF2, the output level of the second comparison module 13 always remains at the first level. Therefore, the level signal output by the first comparison module 12 can be used to determine that the first AC terminal AC_1 is connected to the live wire and the second AC terminal AC_2 is connected to the neutral wire.
[0025] When the first AC terminal AC_1 is connected to the neutral wire, the second AC terminal AC_2 is connected to the live wire, and both the neutral and live wires are powered on, the voltage waveform at the first input terminal V1 of the first comparison module 12 and the voltage waveform at the first input terminal V2 of the second comparison module 13 are as follows: Figure 6As shown. At this time, the voltage at the first input terminal V1 of the first comparison module 12 is compared with the voltage at the first reference voltage terminal VREF1. Since the voltage at the first input terminal V1 of the first comparison module 12 is always less than the voltage at the first reference voltage terminal VREF1, the output level of the first comparison module 12 will always remain at the first level. The voltage at the first input terminal V2 of the second comparison module 13 is compared with the voltage at the first reference voltage terminal VREF1. Whenever the voltage at the first input terminal V2 of the second comparison module 13 is greater than the voltage at the second reference voltage terminal VREF2, the output level of the second comparison module 13 will change from the first level to the second level. Therefore, the level signal output by the second comparison module 13 can be used to determine that the first AC terminal AC_1 is connected to the live wire and the second AC terminal AC_2 is connected to the neutral wire.
[0026] In this embodiment, when the first AC terminal AC_1 and the second AC terminal AC_2 are normally connected, the level signal output by the output terminal of the first comparison module 12 will flip. When the first AC terminal AC_1 and the second AC terminal AC_2 are reversed, the level signal output by the output terminal of the second comparison module 13 will flip. The judgment module can then determine the neutral and live wire information corresponding to the first AC terminal AC_1 and the second AC terminal AC_2 based on the signals output by the first comparison module 12 and / or the second comparison module 13.
[0027] In this embodiment, when one or more emergency lighting control circuits connected to the first AC terminal AC_1 and the second AC terminal AC_2 have their live and neutral wires reversed, the alignment module 15 of the one or more emergency lighting control circuits can adjust the current flow direction so that the current flow direction of the one or more emergency lighting control circuits is consistent with that of the other emergency lighting control circuits.
[0028] In this embodiment, by employing an emergency lighting control circuit including a rectifier module 11, a first comparison module 12, a second comparison module 13, a judgment module, and an alignment module 15, the neutral and live wire information corresponding to the first AC terminal AC_1 and the second AC terminal AC_2 can be determined based on the signals output by the first comparison module 12 and / or the second comparison module 13. This achieves the alignment of the emergency lighting control circuit. It is not enough to simply determine the relative potential between each emergency lighting control circuit and the wire; rather, it is to accurately identify the neutral and live wire information connected to the first AC terminal AC_1 and the second AC terminal AC_2 without misjudgment, thus improving the practicality of mixed connection alignment.
[0029] In some embodiments, the logic judgment module 14 may include a counter to calculate the number of times the output signals of the first comparison module 12 and / or the second comparison module 13 are flipped, and when the number of flips reaches a preset number, the neutral and live wire information corresponding to the first AC terminal AC_1 and the second AC terminal AC_2 is determined.
[0030] In this embodiment, the counter can count the number of times the output signal of the first comparison module 12 and / or the second comparison module 13 flips. Only when the number of flips reaches a preset number is the neutral and live wire information corresponding to the first AC terminal AC_1 and the second AC terminal AC_2 determined. The preset number can be 3 times, 4 times, etc.
[0031] In some embodiments, such as Figure 3 As shown, the emergency lighting control circuit may further include: a first voltage divider module 16, whose first end is connected to the first output end of the rectifier module 11, whose second end is connected to the reference ground end, and whose output end is connected to the first input end V1 of the first comparator module 12.
[0032] In some embodiments, such as Figure 3 As shown, the emergency lighting control circuit may further include: a second voltage divider module 17, the first end of which is connected to the second output terminal of the rectifier module 11, the second end of which is connected to the reference ground terminal, and the output terminal of which is connected to the first input terminal of the second comparator module 13.
[0033] In this embodiment, the first voltage divider module 16 and the second voltage divider module 17 can reduce the voltage required for comparison by the first comparison module 12 and the second comparison module 13, reduce the withstand voltage requirements of the first comparison module 12 and the second comparison module 13, and reduce energy consumption.
[0034] Specifically, such as Figure 4As shown, the first comparison module 12 can be a first comparator OP1, and the second comparison module 13 can be a second comparator OP2. The common junction formed by the second terminals of the first comparator OP1 and the second comparator OP2 is connected to the reference voltage terminal VREF. The first voltage divider module 16 can include a first resistor R1 and a second resistor R2. The first terminal of the first resistor R1 is connected to the first output terminal of the rectifier module 11, and the common junction formed by the second terminals of the first resistor R1 and the first terminals of the second resistor R2 is connected to the first input terminal of the first comparator OP1. The second terminal of the second resistor R2 is connected to the reference ground terminal. The second voltage divider module 17 can include a third resistor R3 and a fourth resistor R4. The first terminal of the third resistor R3 is connected to the second output terminal of the rectifier module 11, and the common junction formed by the second terminals of the third resistor R3 and the first terminals of the fourth resistor R4 is connected to the first input terminal of the second comparator OP2. The second terminal of the fourth resistor R4 is connected to the reference ground terminal. The resistance values of the first resistor R1 and the third resistor R3 can be the same, and the resistance values of the second resistor R2 and the fourth resistor R4 can be the same.
[0035] The "common connection point" described in this embodiment is for the convenience of explaining the circuit structure and should not be limited to a specific intersection formed by connecting two wires. It can also be a wire extending from a specific intersection formed by connecting two wires. Here, only the "common connection point" is used to describe the circuit structure of the emergency lighting control circuit.
[0036] In some embodiments, the first reference voltage terminal VREF1 can be connected to the second reference voltage terminal VREF2.
[0037] In some embodiments, the number of emergency lighting control circuits is multiple.
[0038] This utility model embodiment also provides an emergency lighting control chip, the emergency lighting control circuit including the emergency lighting control circuit as described in any of the above embodiments.
[0039] Since the circuit structure and operation mode of the emergency lighting control circuit in the level control chip of this embodiment are the same as those of the emergency lighting control circuit in the previous embodiment, they will not be described again here.
[0040] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.
Claims
1. An emergency lighting lamp control circuit, characterized by The application relates to an emergency lighting control circuit. The rectifier module is connected with the first AC terminal and the second AC terminal; The first comparison module is connected with the first output terminal of the rectifier module and the first reference voltage terminal; The second comparison module is connected with the second output terminal of the rectifier module and the second reference voltage terminal; The logic judgment module is connected with the output terminal of the first comparison module and the output terminal of the second comparison module, and the zero fire line information corresponding to the first AC terminal and the second AC terminal is determined according to the signals output by the first comparison module and / or the second comparison module; The alignment module is connected with the logic judgment module, and alignment is performed according to the zero fire line information.
2. An emergency lighting lamp control circuit according to claim 1, characterised in that, The logic judgment module comprises a counter, the number of signal flip-flops of the output terminal of the first comparison module and / or the second comparison module is calculated, and the zero fire line information corresponding to the first AC terminal and the second AC terminal is determined when the number of flip-flops reaches a preset number.
3. The emergency lighting circuit of claim 1, wherein, The application further relates to: The first voltage division module is connected with the first output terminal of the rectifier module and the reference ground terminal, and the output terminal is connected with the first input terminal of the first comparison module.
4. The emergency lighting circuit of claim 1, wherein, The application further relates to: The second voltage division module is connected with the second output terminal of the rectifier module and the reference ground terminal, and the output terminal is connected with the first input terminal of the second comparison module.
5. The emergency lighting circuit of claim 1, wherein, The first reference voltage terminal is connected with the second reference voltage terminal.
6. The emergency lighting circuit of claim 1, wherein, The emergency lighting control circuit comprises a plurality of emergency lighting control circuits.
7. An emergency light control chip, characterized by, The emergency lighting control circuit comprises any one of the emergency lighting control circuits in claims 1 to 6.